Carton



June 19, 1934. E, H, LEWANDOWSKI 1,963,626

CARTON Fiied Dec. 15, 1950- 2 Sheets-Sheet 1 1.. I EHE i i." 22

1 I Z YEW/ZIP k .Edward H Lea/andawsd i 35 ii ZZ I u/\ fi June 19, 1934. w N ows 1,963,626

' CARTON Filed Dec. 15, 1950 2 Sheets-Sheet.

Patented June 19, 1934 e r s Edward H. Lewandowski, Neenah, Wis., .assignor, by .mesne assignments, to Marathon Paper .Mills Company, Rothschild, Wis a corporation of Wisconsin Application December 15,- 1930, Serial No. 502,270 11 Claims ((1229-) This invention relates to a carton and particularly .to one made of fiber board impregnated with paraffin for the purpose of waterproofing thecarton and eliminating the necessity of using lining materials.

Cartons made in accordance with the present invention find ready use in packaging of frozen edibles, such for instance, as ice cream and like products.

The manufacture of ice cream, as at present practiced, includes the step of freezing the cream in a freezer to a point where it is homogeneous and viscous and then the cream is run into packages and other containers and then conveyed to a hardening room where the cream is hardened without agitation.

The ice cream as it comes from the freezer is homogeneous and it is, therefore, desirable that the time of hardening be reduced to a minimum to preserve the homogeneity of the cream, as well as reduce hardening room space and reduce the time the packages remain in the hardening room.

Ice cream has been packaged in cartons made,

- from fiber board of .017 or .018 inches thick but thereof filled with the paraflin it is stifiened thus enabling the use of the thin board. This use of parafiined, thin fiber board decreases the heat insulating eifect or, in other words, increases the heat conductivity so that the amount of time necessary for hardening ice cream in cartons made therefrom is reduced.

It is further desirable that the ice cream cartons be sufiiciently strong to allow handling through the ice cream plant and for storage and at the same time properly protect the frozen contents when a package is delivered to a consumer;

Another desirable feature is that such a package should be so made as to readily expose the frozen contents of the package when the same is opened, thereby enabling intact removal of the frozen contents. At the same time, such package should be strong enough to-retain its shape and hold the frozen contents should it be desired to scoop the contents from the carton or package with a scoop or spoon. d 1

An object of the present invention is to provide cartons a carton for ice cream packaging which is made of relatively thin board impregnated with a waxy of the cover, which flap is pasted to a wall of the carton or package for closing the package and is torn off to enable opening of the package for removal of the contents.

A further object of the invention is to provide a carton for ice cream and the likewhich when opened may be spread out flat so as to completely expose the frozen contents of the package for slicing or removal as a whole.

A further object of the invention is to provide a carton for ice cream packaging which is formed from a single blank of boardscored and folded to provide a carton with interlocking endsso arranged and associated with respect to the cover that when the cover is opened the whole carton will open exposing the contents for slicing or removal as a unit.

A still further object of the invention is to provide a carton formed from a single blank of thin board material scored and folded in a box form' and provided with a flap which is glued to close the carton and which is torn off to expose the carton for removal of its contents.

A still further object of the invention is to provide a carton formed of thin board of substanially .012 inches thickness which is impregnated for strengthening purposes.

It is a further object of this invention to provide a carton having a hinged sealing flap integrally connected with the closure member and adapted to be adhesively secured to an adjacent wall of the carton, with meansprovided for preventing the peeling of a fibrous'layer from the inner surface of the closure member when the sealing flap is pulled'todisrupt the adhesive connection and open the carton. I

The above, other and further objects of the invention will be apparent from the following d scription, accompanying drawings and append claims.

Generally speaking the carton of the present invention is made from a thin board such, for instance, as board of .012 inches thickness impregnated with paraflin and folded into box-like form.

The invention further contemplates the provision of a' flap on the cover of the carton which flap is folded back on itself with the folded portions glued together and then with a portion of the flap glued to a wall of the carton for closing the same. The carton is opened by tearing the flap from the wall and with it opening the cover to expose the contents of the carton.

The invention further contemplates a carton made from a single blank of material wherein the end portions have interlocking features so asso- 'trated in the accompanying drawings and the views thereof areas follows:

Figure 1 is a perspective view of a fragmental portion of a carton embodying the present invention showing the interlock atone end of the carton and with the cover pasted in closed position. b

Figure 2 is a perspective view of a fragmental portion of a carton similarto Figure 1 with the interlocking ends arranged in a diifei ent manner.

Figure 3 is a perspective view of a carton embodyingthe present invention and showing the double-end construction with certain of the end tabs separated to show details of the locking arrangement.

Figure 4 is a perspective view of a carton embodying the present invention as the same appears when assembled and the cover in partially open position.

Figure 5 is an inside view of a developed blank from which a carton such as that illustrated in Figure 2 is made.

' Figure 6 is an inside view of a developed blank showing a modification of the interlocking end tabs of the form of the carton of Figure 1 which open completely when-the cover is moved to open position. a

The drawings will now be explained.

The board utilized for carrying out the present invention is very' thin, for instance, .012 inches in thickness. This board is impregnated with paraflin so that the pores of the board are completely filled. Paraflin being a waxy substance stiifens' when hard, imparting strength to the board. The pores of the board being filled by the wax, therefore, increases heat conductivity of the same.

. Referring to Figure 5 of the drawings the blank A is cut and scored to provide what in the present application will be termed front wall 1, bottom 2, rear wall 3 and cover 4. The cover 4 has an extension consisting of portions 5 and 5a with the portion 5 scored, on the line 6 and the portions 5 and 5a separated by a score 7. The portion 5a is folded back against the portion 5 and glued to provide the flap of the finished carton.

The front wall 1 is provided with an end tab 8 at one end and another tab 9 at the other end. The tabs 8 and 9 are provided with hook-shaped portions 13 having undercuts 14. in the lower edges of the hooks.- 1 r The bottom 2 is provided with end tabs 15 and 16 which are rectangular in outline and which are imperforate. The tabs 8 and 15 are separated by a cut 1'7, while the tabs 9 and 16 are separated by a cut 18.

tabs 8, 15, 19a and'9, 18 and 19 respectively of the walls 1, 2 and 3. 1

Figure 1 illustrates a fragmental portion of a carton formed from a blank D of Figure 6 while Figure 2 illustrates a fragmental portion of a carton formed from the blank A of Figure 5.

Figure 3 illustrates a carton in substantially complete box-like form with certain of the interlocking end tabs open.

The blanks as shown in Figures 5 and 6 are made in the formsthere illustrated, and then the paraiiin is applied. The part 5a is then glued to part 5 by folding along score '7 and the part 511 is then glued to the outer face of the front 1.

The cartons are shipped by the carton manufacturer to the carton user knocked down fiat, with part 5a. glued to front 1 as stated.

The making of the flap B in the manner stated increases its strength so that it will not readily tear, also when torn off there will be no peeling action of one or ,more liners of the stock.

.When being filled the carton is closed at one. end for example, folding the tabs 8, 15, l9a and 20 of Figure 5. The tab 15 is bent up at rightangles to bottom 2, the tab 20 is bent down against 15, and the hook 13 inserted in. notch 11 of tab 19a to lock together the tabs mentioned.

The carton is then placed in a stirrup with the closed end just described serving as the bottom, for filling. The tabs or flaps 9, 16, 19 and 21 are then folded back fiat against the outsides of the panels 1, 2, 3 and 4 thus leaving an end opening for filling. After the carton has been filled. the flaps 9, 16, Hand 2-1 are closed and locked, and the carton transferred to the hardening room.

The carton is opened by tearing the flap B from front wall 1. Such tearing of the fiap, because of its double thickness, does not peel any part of the wall 4.

Figure 2 illustrates the right end of a carton made from the blank A of Figure 5 and shows the tab 9 of front wall 1 in hooking engagement with the tab 19 of the rear wall.

Figure 4 illustrates the appearance of the carton made from the blank D of Figure 6 when fully assembled and showing the appearance of the front wall 1 after the fiap E has been torn therefrom, the dots C'indicating the roughened appearance of the upper edge of the front wall after the flap E has been torn therefrom for opening the package.

A carton made with interlocking ends of the front and rear walls associated as illustrated in Figure 2 will prevent unlocking of these ends when the cover 4 is raised to expose the contents of the carton. I The blank D illustrated in Figure 6 is made of the same thin board, that is .012 inches in thickness, impregnated with parafiin and as there illustrated includes a front wall 22, a bottom 23, a rear wall 24 and a cover 25. The cover 25 has an extension consisting of the portions 26 and 26a. The portion 26 is scored on line 27 while the portions 26 and 26a are separated by a score 28. The portion 26a is folded back and glued to the portion 26 forming a fiap E similar to the flap B of Figure 5.

The front wall 22 is provided with end tabs 29 and30 similar in all respects to the end tabs 19 and 19a of the rear wall 3 of the blank of Figure 5. The end tabs 29 and 30 are each provided with tongues 31 forming slots 32 and 33.

rectangular end tabs and 35 which are sepatabs 38 and 39 is provided with a hook40 and an under cut 411101 cooperating with the slots formed in the end tabs 29 and30 of the front wall 22.

The cover 25 tabs 42 and (3. J

A carton made from the blank of Figure 6 is formed .in the same manner as described with respect to the blank of Figure 5, i. e. the flap E is formed by gluing part 260. to part 26 and is provided with rectangular end then gluing 26a to the outer face of front wall 22. For filling, the flaps 29', 34, 38 and 42 are closed and locked, and the flaps 30, 35, 39 and 43 bent back against the parts 22, 23, 24 and '25, and later closed and locked after filling.

Wheh a carton made in accordance with the blank of. Figure 6 is opened, that is, when the flap E is torn from the front wall 22 and the cover 25 raised, the hooks 40 will become disengaged from the slots in'the end tabs 29 and 30 of the front wall thus enabling complete opening of the carton sothat the frozen contents thereof stand clear of the carton, whereupon the frozen block. may be removed as a whole or else sliced while resting on the bottom 23 of the carton.

A carton made from the. blank of Figure 6 would have both of its ends appearing as illustrated in Figure 1,that is, with both of the hooks 40 extending forwardly ready to be unhooked when the cover is raised.

A carton made from the blank of Figure 5.

would have the ends appearing as illustrated in Figure 2. This arrangement by reason of the fact that the end tab 9 of the front wall 1 extends rearwardly and hooks into the end tab 19 of the rear wall 3 tends to prevent the carton from opening up fiat without first manually disengaging the lockingtabs 8 and 9. This construction is useful when it is desired to scoop the frozen contents from the container, as with a spoon or ice cream scoop.

A carton made in accordance with the present invention, that is, made with board of .012 inches thickness impregnated with paraflin is assembled in a'box-like form as described, with one end open and the ice cream which has been frozen, that is, which has been mixed and stirred to a point short of solidification is discharged into the open carton. The carton is then closed by closing and locking the flaps at the open end, as

described.

It has been found that cartons made in accordance with the present invention reduce the time of hardening the ice cream as much as thirty per cent. Consequently, the ice cream is hardened more quickly, thus preserving the homogeneity of the same. Furthermore, no liner is used, the ice cream being poured directly into the carton.

In like manner the increase of the speed of the hardening operation enables reduction of the size of the hardening room and also facilitates the movement of the packages through the hardening room. a

A carton made from the thin board impregnated in the manner described is strong enough to retain the contents while filling without bulging of the carton, and strong enough to withstand handling through thehardening room and storage spaces. It is also strong enough to withstand handling by the consumer.

It is observed that but a single movement of the hand is necessary to open the carton of the present invention. The user inserts a finger nail under the flap, tears it from the front wall and then raises the cover. The formation of the flap in the manner described, that is by bending back a portion of the flap on itself and gluing the same enablesready removal of the flap from the W The gist of the invention resides in the formation ofa carton from relatively thin board which is impregnated to strengthen the same and to increase the heat conductivity of the carton, and also resides in the provision of the flap which is doubled on itself and glued and which is grasped when it is desired to open" the carton.

The invention has been described herein more or less precisely as to details but it is to be understood that the invention is not to be limited thereby as changes may be made in arrangement and proportion of parts and that equivalents may be substituted without departing from the spirit and scopeof the invention.

The invention isclaimed as follows:

1. A container, said container comprising a. one-piece blank cut and scored and foldable into box form, the end members of the box having interlocking engagement, the cover having an integral extending flap which is folded back on itself and the folded portions securedtogether, the flap being secured to the front wall of the container by pasting the folded back portion only adjacent its inner edge to the front wall thereby providing a line of cleavage and a free grasping edge so that the package may be opened by tearing the flap from the wall, the interlocked end members remaining in interlocked engagee ment during the opening of the cover.

2. A carton of paper board, said carton having acover provided with an integral extending flap which is folded back on itself and the folded portions secured together, the flap being secured to a wall of the carton by pasting the folded back portion only adjacent its inner edge to the wall thereby providing a line of cleavage and a free grasping edge so that the carton may be opened by tearing the flap from the wall.

3. A carton of paper board, said carton having a cover provided with an integral extending flap portion to be bent normal to the cover and secured to a wall of the carton, said flap having a portion thereof formed of several thicknesses of board with the several thicknesses secured together, one of said thicknesses presenting an inner edge providing a line of cleavage when the flap is in secured position, said flap being secured to a wall of the carton by pasting said last named thickness of board only adjacent its inner edge to a wall of the carton, thereby providing a free grasping edge and a line of cleavage, the carton being opened by tearing the flap loose from the wall.

4. A carton of paper board, said carton having a cover provided with an integral extending flap portion to be bent normal to the cover and secured to an upstanding wall'of the carton, said flap having, a portion thereof formed of several thicknesses of board secured together, one of said thicknesses presenting an inner and upper edge providing a line of cleavage when the flap is in secured position, said flap being secured to I edge being positioned substantially inv alinement with I I 5. A paper carton consisting of containing walls the upper edge of said wall.

and a hinged closure formed with two free edges, a hinged edge, and a sealed edge, a hinged sealing outer flap, adhesived securing means positioned between the sealing fiap and the inner structure of the front containing wall of the carton, the said means being discontinuous with the inner surface fibres of the closure.

6. A carton formed of a paper blank scored and foldable into box form, the bottom and top walls having overlapping tabs at each end constituting end walls, said top wall forming a closure, the front and back walls having at their respective ends interlocking tabs forming outside end walls, a hinged sealing flap, adhesived securing means between the sealing flap and the inner structure of the front wall of the carton, the said means fibrous Structure to prevent being discontinuous with the inner surface fibres of the closure. 7. A carton comprising containing walls; a hinged closure having two free edges, a hinged edge and a sealed edge; a hinged sealing flap on the outside having a continuity of fibrous structure with the closure structure; adhesived fibrous securing means positioned between the inner structure of the front containing wall of the carton and the aforesaid continuous fiber structure of the sealing flap, the fibers of the securing means being discontinuous with the inner surface fibers 'of the closure.

8. A fiber board carton comprising containing walls; a hinged closure having two free edges, a hinged edge and a sealed edge; a hinged sealing fiap integrally extending from said closure along away from a free edge said sealing edge and overlying'an adjacentcon taining wall, adhesived portions of said flap and of said wall being joinedtogether and one of said adhesived portions tinuity of fibrous structure such that the opening of said closure will not cause a fibrous layer to peel from the inner surface of said closure.

9. A fiber board carton comprising containing walls; a hinged closure having two free edges, a hinged edge and a sealing edge; a sealing tab forming an integral hinged extension on said sealing edge of said closure; and a fibrous securing member adapted to be adhesively secured to said tab and to the front fibrous structure of said securing member being discontinuous along one edge with the inner surface fibers of said closure to prevent peeling of said inner surface fibers upon rupture of the adhesived connection between said member and said front wall.

10. A carton formed of a. piece of fiber board scored and cut to define integral members brought together in juxtaposed relation to provide walls and a closure for the carton, said closure having a hinged sealing fiap integrally extending therefromand overlapping an adjacent wall, an adhesive between an overlapped portion of said flap and said adjacent wall securing said flap to said wall, one of said adhesived overlapping portions being provided with a discontinuity of peeling of the inner closure surface when the closure is removed to open the carton.

11. A carton formed of a piece of fiber board scored and cut to define integral members brought together juxtaposed relation to provide side and bottom walls and a closure wall for the carton, one of said walls having a hinged sealing flap integrally extending therefrom and overlapping an adjacent wall portion, an adhesive positioned .of said flap between an overlapped portion of said flap and said adjacent I wall portion securing said flap to said wall portion,

one of said, adhesived overlapping portions being provided with a discontinuity of fibrous structure to prevent peeling of a fibrous surface layer from said overlapping portion when the carton is opened by rupturing said adhesivea EDWARD H. LEWANDOWSKL being provided with a discon-.

wall of the carton, the 

